DE3217033C2 - - Google Patents
Info
- Publication number
- DE3217033C2 DE3217033C2 DE3217033A DE3217033A DE3217033C2 DE 3217033 C2 DE3217033 C2 DE 3217033C2 DE 3217033 A DE3217033 A DE 3217033A DE 3217033 A DE3217033 A DE 3217033A DE 3217033 C2 DE3217033 C2 DE 3217033C2
- Authority
- DE
- Germany
- Prior art keywords
- signal
- coil
- transmitter
- amplitude
- generated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005672 electromagnetic field Effects 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 230000001419 dependent effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000003321 amplification Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005293 physical law Methods 0.000 description 2
- 241001464057 Electroma Species 0.000 description 1
- 230000035508 accumulation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
- G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
- G01V3/105—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Electromagnetism (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8102827A SE426269B (sv) | 1981-05-06 | 1981-05-06 | Anordning vid detektering av metallforemal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3217033A1 DE3217033A1 (de) | 1982-11-25 |
| DE3217033C2 true DE3217033C2 (it) | 1991-01-03 |
Family
ID=20343740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19823217033 Granted DE3217033A1 (de) | 1981-05-06 | 1982-05-06 | Detektoreinrichtung fuer metallische objekte |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS57192887A (it) |
| BE (1) | BE893088A (it) |
| CA (1) | CA1198165A (it) |
| CH (1) | CH656231A5 (it) |
| DE (1) | DE3217033A1 (it) |
| FR (1) | FR2505508B1 (it) |
| GB (1) | GB2097933B (it) |
| IT (1) | IT1147941B (it) |
| NL (1) | NL8201811A (it) |
| NO (1) | NO821485L (it) |
| SE (1) | SE426269B (it) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59141001A (ja) * | 1983-02-01 | 1984-08-13 | Mitsubishi Electric Corp | 金属管の有効端末位置検出方法 |
| SE470289B (sv) * | 1992-11-04 | 1994-01-10 | Bofors Ab | Magnetiskt zonrör |
| US5426363A (en) * | 1993-04-26 | 1995-06-20 | Kabushiki Kaisha Honda Denshi Giken | Object detecting device |
| AU2009262370B2 (en) * | 2008-06-27 | 2014-11-27 | Minelab Electronics Pty Limited | Constant current metal detector with driven transmit coil |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB835128A (en) * | 1955-09-17 | 1960-05-18 | Asea Ab | Apparatus for examining a substance utilising the effect of the substance on the q factor of a resonant circuit |
| DE2052989C3 (de) * | 1970-10-30 | 1973-11-08 | Guenther Dipl.-Ing. 2209 Sushoern Weber | Durch einen oder mehrere sich be wegende Gegenstande auslosbares Schalt gerat |
| GB1448877A (en) * | 1973-09-04 | 1976-09-08 | Weber G | Electronic switching device for sensing a body and for converting such sensing into an electrical signal |
| GB1561641A (en) * | 1976-08-05 | 1980-02-27 | Redland Automation Ltd | Presence detector apparatus |
| LU75628A1 (it) * | 1976-08-19 | 1978-04-13 | ||
| DE2722511A1 (de) * | 1977-05-18 | 1978-11-30 | Voll Walter | Metallsuchgeraet |
| DE2722498C3 (de) * | 1977-05-18 | 1982-02-04 | Walter Ing.(Grad.) 8728 Hassfurt Voll | Einrichtung an einem Kraftfahrzeug zur Anzeige eines Mindestabstandes |
-
1981
- 1981-05-06 SE SE8102827A patent/SE426269B/sv not_active IP Right Cessation
-
1982
- 1982-04-22 GB GB8211642A patent/GB2097933B/en not_active Expired
- 1982-05-03 NL NL8201811A patent/NL8201811A/nl not_active Application Discontinuation
- 1982-05-04 JP JP57075053A patent/JPS57192887A/ja active Pending
- 1982-05-05 FR FR8207818A patent/FR2505508B1/fr not_active Expired
- 1982-05-05 CH CH2774/82A patent/CH656231A5/de not_active IP Right Cessation
- 1982-05-05 IT IT48333/82A patent/IT1147941B/it active
- 1982-05-05 NO NO821485A patent/NO821485L/no unknown
- 1982-05-05 CA CA000402340A patent/CA1198165A/en not_active Expired
- 1982-05-06 DE DE19823217033 patent/DE3217033A1/de active Granted
- 1982-05-06 BE BE0/208015A patent/BE893088A/fr not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB2097933A (en) | 1982-11-10 |
| NL8201811A (nl) | 1982-12-01 |
| IT8248333A0 (it) | 1982-05-05 |
| SE8102827L (sv) | 1982-11-07 |
| IT1147941B (it) | 1986-11-26 |
| CA1198165A (en) | 1985-12-17 |
| FR2505508A1 (fr) | 1982-11-12 |
| DE3217033A1 (de) | 1982-11-25 |
| JPS57192887A (en) | 1982-11-27 |
| CH656231A5 (de) | 1986-06-13 |
| NO821485L (no) | 1982-11-08 |
| FR2505508B1 (fr) | 1985-11-29 |
| BE893088A (fr) | 1982-08-30 |
| GB2097933B (en) | 1985-05-15 |
| SE426269B (sv) | 1982-12-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| D2 | Grant after examination | ||
| 8363 | Opposition against the patent | ||
| 8330 | Complete renunciation |